abstract: the main aim of the vibration energy harvesters is to locally power autonomous devices such as wireless sensors. generally, power levels are low and the environmental benefit of the technology is to replace batteries rather than saving energy per se. piezoelectric vibrational energy harvesters are usually inertial mass based devices, where a cantilever beam with a piezoelectric outer ...

The excessive deflection of large-span cantilever cast prestressed concrete (LCCPC) box girders has always been a complex problem to be solved in bridge engineering. To analyze the effect shear deformation at segmental joints on LCCPC girders, comparison tests were carried out three (PC) I-girders with and PC I-girder without joints, finite element simulation method was proposed based tests. Su...

Abstract A new bridge was built in Kalix, northern Sweden, to replace an existing prestressed concrete box‐girder that had been service for over 60 years. The old a total length of 283.6 m divided into five spans: 43.9 m, 47.0 94.0 and m. It constructed using the balanced cantilever method with segments having lengths around 3.0 need replacement arose from recommendations extracted assessment b...

BACKGROUND Recent anatomic studies suggest the superficial musculoaponeurotic system (SMAS) layer attenuates in the midface. This led the author to switch from a bilamellar high SMAS dissection to a "total composite flap" technique, preserving skin and SMAS/platysma as one layer in a critical "deep-plane transition zone" (DTZ) lateral to the zygomaticus major muscle. This allows traction on the...

The study aims to further standardize the construction process, improve quality, and ensure stability of infrastructure construction. continuous rigid-frame bridge is taken as research object, finite element model body established by using beam element, overall analyzed in completion stages. Moreover, coefficient buckling mode are under different working conditions each stage, linear variation ...

Cantilevers fabricated by means of micromachining techniques are usually used for atomic force microscopy. In this paper, the spring constant of an atomic force microscope (AFM) cantilever is determined by using a large-scale cantilever. Since the spring constant of the large-scale cantilever is calibrated accurately, the spring constant of the AFM cantilever is determined precisely by measurin...